After you have booked a server and are given the details you may find these commands to be helpful.
To setup the server properly depending on the game format you are playing, you will want to use rcon to execute configs made for these specific gametypes.

Essentials

rcon exec ozfortress_6v6_5cp
Executes the configs you need for OZF rounds on standard 5CP maps. These are played to 30 minutes with a 5 point difference mercy rule.rcon exec ozfortress_6v6_koth
Executes the configs you need for OZF rounds on King-of-the-Hill maps. These are played first to 3 with no time limit.rcon ozfortress_6v6_scrim
Executes the configs for scrimmage practice. Includes all necessary commands to play a 30 minute, no cap limit match.